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public class
 WHSchleifen2 {
    public static void
 main(String[] args) {
        int
 zaehler;
        int
 s;
        zaehler = 0
;
        s = 0
;
        while(zaehler <= 3
) {
            s = s + zaehler;
            System.out.print
(s);
            zaehler = zaehler + 1
;
        }
    }
}